tried-and-true的中文翻译是什么意思

There's a lot in sales and marketing that tried and true.

在销售和营销中有很多这样的真实例子.

This is a tried and true way of saving water.

这是一种行之有效的节水方法.

And if old tried - and - true paradigms really aren't working, what does work?

而如果旧的试错样式真的已经过时, 什么有用?

Now you can apply tried and true principles to your own game.

现在你能把挥杆八步法的真正原理应用到你自己的高尔夫运动中了.

Tried and True Rent - a - Car.

这里是诚信租车公司.